I'm very sorry to hear of your loss and personal situation and wish you all the best.

On your question, how about Singapore? MEM-ATL-NRT-SIN yields 10,506 miles each way; depending on fare class, the MQM yield could be rather substantial. You might also wish to play around with www.gcmap.com for some other ideas; for instance, Cape Town via ATL and CDG on AF is similar.

One suggestion which I will toss out there on the theory of "it never hurts to ask" with no assurance whatsoever that it may be successful is to call Delta and see what they might be able to do for you in extending 2014 status given your rather unique situation.